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W. SC'HULZE.

'1f-IRON SEMES.

No. 581,176.L Patented'Apr. 20, 1897.

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W. SCHULZE. T-IRON SHEARS.

(No Model.)

No. 581,176. Patented Apr. 20, 1897.

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UNITE STATES i ATnNr unica.

WILHELM SOHULZE, OF K'IHEN, GERMANY, ASSIGNOR OF ONE-HALF TO EDUARD NAUMANN, OF SAME PLACE.

T-IRON SHEARS.

SPECIFICATION forming part of Letters Patent No. 581,176, dated April 20, 1897.

Application filed April 17, 1896. Serial No. 588,036. (No model.) Patented in Germany March 13,1895,No. 84,960; in Austria January 2, 1896,1To. 13/46; in Belgium May 26,1896,No. 121,583, and in England September 28,1896, No. 21,424.

To cir/ZZ whom it may concern.-

Be it known that I, WILHELM SCHULZE, a subject of the Emperor of Germany, residing at Kthen, in the Duchy of Anhalt, German Empire, have invented new and useful T-Iron Shears, of which the following is a specification.

The invention has been patented in Germany, No. 84,960, dated March 18, 1895 in Belgium, No. 121,583, dated May 26, 1896; in England, No. 21,424, dated September 28, 1896, and in Austria, Vol. XIII, fol. 4.6, dated January 2, 1896.` y

My present invention relates to machinetools for' cutting oft' iron bars of T, I, and similar sections; and it consists in an arrangement of two auxiliary side blades each adapted to tit into one of the two angular spaces which are Jformed by the iiange and the web of the bar, so as to touch the surfaces of both parts and to support the bar during the cutting operation. These side blades are pivoted to the frame at such points that the pressure exerted on the bar by pressing the main blade against the out-er surface of the flange not only forces the side blades into the flange from its innerside, but forces them into the web. It' an Ifiron is to be cut, the shears are tirst made to operate on one T and the bar is reversed for the other T to be cut.

In the annexed drawings, Figure 1 is a front view of a machine-tool constructed according to my invention for cutting bars of T, I, and similar sections. Fig. 2 is a horizontal section on line 2 2 in Fig. 1. Fig. 3 shows in a vertical section on line 8 3 in Fig. 4. the operating device of the machine. Fig. 4. is a horizontal section on line a 4 in Fig. 3.

The frame of the machine consists of two plates 1o p, which are connected by stays b. An aperture p in either plate allows the bar to be introduced, the bar being represented as of I section, having two iianges t t and a web t2. A cross-piece q in the lower part of the aperture may serve as a support for facilitating the introduction and the reversal of the I-bar. The angular side blades e e form the ends of arms e0 e0, which are pivoted to the frame at c c. As will be seen from the drawings, the pivot of either side blade is situated beneath and-outwardly form the angular cutting edges of the blade when in operative position, so that both blades by a downwardly-directed pressure on their upper edges will be directed toward each other, so as to cut the web t2 from both sides. For moving the side blades into and out of their working position their arms e0 e0 are connected by links s s with hand-levers Z Z', pivoted to the frame at Z0 Z0.

The main blade ct is by means of its stem a vertically guided between a pair of flanges of two angular bars o o, the other flanges of which are riveted to one of the plates p,

-while two fiat bars w w, riveted to the other plate p, prevent the guiding-nanges from being bent outwardly. The blade a is pressed down by the action of a cam d, (shown as an eccentric disk,) which is arranged on a short shaft f, mounted in the plates p. The cam d is preferably at such a distance from the stem a that a wedge 7e with a handle k may be interposed. In this case when the blades have been operated the blade a may be raised (for which purpose a rod m is connected with the stem a of the blade and adapted to be managed by means of a hand-lever i, pivoted to the frame at z",) without previously lifting the levers h as soon as the intermediate wedge 7c has been removed. Moreover, the I- bar may be more easily introduced into the machine and reversed therein, if a greater space between the main blade and the side blades is provided for than is required by the thickness of the flanges t'.

The cam d may be operated by any suitable means. In the construction shown two levers h h, provided with handles g g', are for this purpose secured to the ends of the shaft f and immovably connected to each other by a rod g, which carries two rocking brackets u u', provided with handles uva@ and ratchet-dogs r fr and embracing racks .e e'. Of these racks is pivoted to the frame at o and provided at its lower part with a footstep zo, by means of which it may be swung outwardly to engage the dog r'. The rack z, which is adapted to engage the dog r, is pivotally connected at o' or o2 with a hand-lever h', pivoted to the frame at a suitable point zoo for instance, as shown, at the saine point o where the rack .2 is fulerumed. The pitch of rack z is smaller than that of rack .2'.

rlhe operation of the n'lechanism for moving the cam d is as follows By pressing down the lever 71, the rack .2' is lowered, and as it is connected by means of dog r, bracket u, rod g, and levers h 71y with shaft f the cani (l on this shaft is turned over an angle correspending to the downward stroke of the lever 7L' toward the wedge 7e, so as to operate the cutting-blades. During this movement the dog fr' slides downward over the teeth of the rack .2V and engages this rack at the end of the movement. This engagement maybe secured by using the foot-step .20, while the lever 7L is raised for another stroke and the teeth of the rack slide over the dog yr, the rocking bracket 1t swinging slightly upwardly to allow this sliding movement.

That I claim as my invention, and desire to secure by Letters Patent of the United States, is

l. In combination in a machine for euttin g T-irons, a pair of side cutters having rightangular cutting edges arranged to fit into the corners of the iron and against the web and 'flange forming said corners, a main cutter operating on the outer face of said flange against which the side cutters bear and means for operating the main cutter, said side cutters being pivoted to press toward each other under the thrust of the main cutter, said side eutters cooperating with the main cutters to cut the llanges and being also pressed inwardly to cut the web, substantially as described,

il. ln combination in a machine for cutting T-iron, a pair of side cutters arranged to lit into the corners formed by the ilange and web, said cutters extending upwardly and inwardly from their pivot-points to support the T-iron, and a main cutter with means for operating' the same vertically toward the pair of side cutters, said side euttersbeing adapted to be pressed inward under the thrust of the main cutter, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

WILHELM SCHULZE.

lVitnesses:

CARL Ronnn'r GRUMENT, EnwiN Rimes. 

